怎么样判断手机端的手指想左右，上下滑动？

Question

手机

Answer 1

如android 有对应 的api  的。

Answer 2

移动端的touch事件-滑动小插件（五）看看有没有一点点帮助。

Answer 3

    function touches(obj,direction,fun){  
            //obj:ID对象  
            //direction:swipeleft,swiperight,swipetop,swipedown,singleTap,touchstart,touchmove,touchend  
            //          划左，    划右，     划上，   划下，    点击，    开始触摸， 触摸移动， 触摸结束  
            //fun:回调函数  
            var defaults = {x: 5,y: 5,ox:0,oy:0,nx:0,ny:0};  
            direction=direction.toLowerCase();  
            //配置：划的范围在5X5像素内当点击处理  
            obj.addEventListener("touchstart",function() {  
                defaults.ox = event.targetTouches[0].pageX;  
                defaults.oy = event.targetTouches[0].pageY;  
                defaults.nx = defaults.ox;  
                defaults.ny = defaults.oy;  
                if(direction.indexOf("touchstart")!=-1)fun();  
            }, false);  
            obj.addEventListener("touchmove",function() {  
                event.preventDefault();  
                defaults.nx = event.targetTouches[0].pageX;  
                defaults.ny = event.targetTouches[0].pageY;  
                if(direction.indexOf("touchmove")!=-1)fun();  
            }, false);  
            obj.addEventListener("touchend",function() {  
                var changeY = defaults.oy - defaults.ny;  
                var changeX = defaults.ox - defaults.nx;  
                if(Math.abs(changeX)>Math.abs(changeY)&&Math.abs(changeY)>defaults.y){  
                    //左右事件  
                    if(changeX > 0) {  
                        if(direction.indexOf("swipeleft")!=-1)fun();  
                    }else{  
                        if(direction.indexOf("swiperight")!=-1)fun();  
                    }  
                }else if(Math.abs(changeY)>Math.abs(changeX)&&Math.abs(changeX)>defaults.x){  
                    //上下事件  
                    if(changeY > 0) {  
                        if(direction.indexOf("swipetop")!=-1)fun();  
                    }else{  
                        if(direction.indexOf("swipedown")!=-1)fun();  
                    }  
                }else{  
                    //点击事件  
                    if(direction.indexOf("singleTap")!=-1)fun();  
                }  
                if(direction.indexOf("touchend")!=-1)fun();  
            }, false);  
        }